吉林大学学报(医学版)

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miR-205靶定YES1对肺癌细胞A549的增殖抑制作用

程远1,甄永占2,郝晓方2,邬鹏宇1,熊亚南2,刘志勇1,崔和勤2   

  1. (1.河北联合大学附属医院心胸外科,河北 唐山063000;2.河北联合大学基础医学院组织学与胚胎学教研室,河北 唐山063000)
  • 收稿日期:2013-10-09 出版日期:2014-05-28 发布日期:2014-05-28
  • 通讯作者: 刘志勇 E-mail:(Tel: 0315-3721567,E-mail:macromicro@126.com)
  • 作者简介:程 远(1989-),男,河北省唐山市人,在读医学硕士,主要从事肺癌分子学机制的研究。
  • 基金资助:

    国家自然科学基金青年基金资助课题(81201281/H1904);河北省科技厅自然科学基金项目资助课题(H2013209180,C2012401037,H2013209040);河北省唐山市科技计划项目资助课题(12140209A-4)

Inhibitory effect of  miR-205  targeted YES1 on proliferation of  A549 cells

CHENG Yuan1,ZHEN Yong-zhan2,HAO Xiao-fang2,WU Peng-yu1,XIONG Ya-nan2,LIU Zhi-yong1,CUI He-qin2   

  1. (1. Department of Cardiothoracic Surgury,Affiliated Hospital,Hebei United University,Tangshan 063000,China; 2. Department of Histology and Embryology,College of Basic Medical Sciences,Hebei United University,Tangshan 063000,China)[KH*2]
  • Received:2013-10-09 Online:2014-05-28 Published:2014-05-28

摘要:

目的:利用实时定量RT-PCR技术和双荧光蛋白报告基因分析系统检测miR-205在肺癌组织及A549细胞系中的表达水平以及其直接靶基因YES1,探讨miR-205抑制肺癌细胞A549增殖的可能机制。方法: 实时定量RT-PCR技术检测10例肺癌组织和10例癌旁正常肺组织中miR-205的表达水平;miR-205 mimics和control mimics分别转染A549细胞,利用细胞计数和集落形成实验检测转染后A549细胞的增殖情况。选取表达绿色荧光蛋白的质粒 pcDNA3/EGFP,将YES1 3′UTR的一段特异性序列、YES1 3′UTR(miR-205互补位点)点突变后的序列分别插入该质粒中,构建YES1-3′UTR和mut-YES1-3′UTR的绿色荧光表达质粒。实验分为YES1-3′UTR、YES1-3′UTR与miR-205 mimics、YES1-3′UTR与control mimics、mut-YES1-3′UTR、mut-YES1-3′UTR与miR-205 mimics和mut-YES1-3′UTR与control mimics共6组,均与表达红色荧光蛋白pDsRed2-N1共同转染肺癌细胞系A549,荧光分光光度计进行蛋白定性和定量检测。结果:与癌旁正常肺组织比较,miR-205在肺癌组织及A549细胞中表达水平降低(P<0.05);miR-205mimics 转染组A549细胞增殖率明显低于转染control mimics对照组(P<0.05);YES1-3′UTR与miR-205 mimics共转实验组荧光蛋白表达水平低于YES1-3′UTR与control mimics共转染组(P<0.01);YES1蛋白高表达组A549细胞细胞克隆形成数高于细胞对照组(P<0.05)。结论: miR-205可能通过靶定靶基因YES1抑制了肺癌细胞A549的增殖,提示miR-205和YES1有可能成为肿瘤生物治疗的新靶点。

关键词: miR-205, YES1, 肺肿瘤, 细胞增殖

Abstract:

To detect the expression levels of the miR-205 in lung cancer tissue and A549 cells and its targeted gene YES1 using qRT-PCR and  dual fluorescence protein repoter assay system,and to explore the possible mechanism of miR-205 to inhibit the proliferation of lung cancer A549 cells.Methods The expression levels of miR-205 in 10 cases of lung cancer tissue and adjacent normal lung tissue were detected with qRT-PCR.The cell growth curve and colony formation assay were used to determine the proliferation rate of A549 cells after transfected by miR-205 mimics and control mimics.The sequences of YES1 3′UTR (untranslated region) and mutation target sites of YES1 3′UTR were inserted into the plasmid which expressed green fluorescence protein (pcDNA3/EGFP) respectively to construct the green fluorescence protein plasmids of YES1-3′UTR and mut-YES1- 3′UTR.There were six groups in the study: YES1-3′UTR,YES1-3′UTR and miR-205 mimics,YES1-3′UTR and control mimics,mut-YES1-3′UTR,mut-YES1-3′UTR and miR-205 mimics,mut-YES1- 3′UTR and control mimics;after the plasmids expressed red fluorescent protein (pDsRed2 -N1 ) were cotransfected into A549 cells,the extracted protein was detected with  fluorescence spectrophotometer.Results Compared with adjacent normal lung tissue,the expression levels of miR-205 in lung cancer tissue and A549 cells were decreased (P<0.05); the proliferation rate of A549 cells in miR-205 mimics group was lower than that in control mimics group (P<0.05).The fluorescence protein expression level in YES1-3′UTR and miR-205 mimics co-transfected group was lower than that in  YES1-3′UTR and control mimics co-transfected group,the difference was statistically significant (P<0.01). The number of cell colony formation of A549 cells in highly expressed YES1  group  was higher than that in cell control group (P<0.05).Conclusion MiR-205 may inhibit the proliferation of A549 cells  through regulating of the expression of YES1 directly.miR-205 and YES1 are potential therapeutic targets for the biological trea
tment of tumor.

Key words: miR-205, v-yes-1 yamaguchi sarcoma viral oncogene homolog 1, lung neoplasms, cell proliferation

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